Alpha ALPHA6000 Series - Page 117

Chapter 5 Parameter Introductions
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117
Brake First and then start
Output Freq.(Hz)
DC injec tion br aking time
Br ak ing
energy
Time
Time
Braking voltage
Running command
St op command
Fig. 5-1-1 Brake First and then start
◆Speed tracking restart: Search and catch the motor’s running direction and speed, and
then start at the caught speed , running to the reference frequency within the Acc/Dec
time, realize smooth start of motor, as shown in Fig. 5-1-2. This mode is suitable for
the motor with big inertial load.
Power
off
Operation Freq.
Motor speed
Detect motor's speed and direction
Output voltage
Time
Time
Time
Fig. 5-1-2 Speed tracking restart diagram